William mttmbrauer



W. MUMBRAUER.

DOOR CLOSURE.

APPLICATION HLED own. 1918.

1,323,783. Patented Dec. 2,1919.

Inventor Alibi-nay quickly Wrrnn sraans Parana? orrron.

WILLIAM UMBRAUER, on NEW YOR 1v. Y.

DOOR-CLOSURE.

To all whom it may concern Be it known that I, WILLIAM MUMBRAUER, a citizen of the United States, and a resident of New York city, in the county of Bronx and State of New York, have invented certain new and usefullmprovements in Door- Closures, of which the following is a specification.

This invention relates to a door closure of novel construction, more particularly designed for bolting a single door to the door frame in such a manner that the door will become unbolted by pressure exerted in a direction toward the face of the door. The invention is-more particularly adapted for theaters. moving picture houses, and other places of assemblage, in which it is desirable that the doors controlling the exits be opened by a forwardly surging crowd, thus facilitating dismissal and preventing overcrowding or panic.

In the accompanying drawing:

Figure 1 is an interior elevation of a door provided with a closure embodying my invention;

Fig. 2, a plan; 7

Fig. 3, a longitudinal section on line 3-3 Fig. 2, and

Fig. 4. a cross section on line 4--4 Fig. 3.

The single leaf 1 of the door is set into the door frame 2 and turns on hinges 3. To the inner face of leaf 1 is secured the cylindrical casing 4 of a bolt .5, which'is under tension to be shot out by a spring 6 contained within the casing. The casing is set off a slight distance from the face of the door, and is encompassed by an axially rotatable tubular sleeve 7.

Casing 4 is provided with a transverse slot 8 while bolt 5 is provided with a bayonet slot 9, the transverse portion of which registers with slot 8. A pin or member 10, projecting from the bore of sleeve 7 through slot 8 looks the bolt in its outer or shot position when the sleeve is so turned that its pin 10 is out of alinement with the axially extending portion of slot 9. When, however, the sleeve is turned to carry its pin into alinement with said axially extending portion, the bolt is released, and is freeto be pushed back or into.

its open position against action of spring 6. In order that the sleeve may be freely turned by a pressure exerted in a direction toward the inner face of the door, saidv sleeve is provided with a flat plate or handle 11, facing or placed lengthwise of the casing and door,

Specification of Letters Patent.

and which by being pushed or swung out: ward, will so turn the sleeve as to release the bolt, while by being swung inward,it will relock the same. In order to push back the bolt when released in the manner described, there projects into the door frame, opposite the lock style of the door, a stop or abutment consisting preferably of a roller 12. This roller is partly sunk within a recess 13 of the door frame, and turns on an upright spindle 14, engaging bearings 15, fitted into said recess, though of course, the roller may be fast on the spindle while the latter turns in its bearings. The correlation of the parts is such that in the closed position of the door,

the spindle 1 1 is located at a point back of the bolt-axis, and that the bolt bears upon the device is as folsure against the inner face'of the door will Patented Dec. 2, 1919.

Application filed December 2?, 1918. 'Serial No. 268,449. i I

not open the same, owing to the fact that therigid or inflexible engagement between bolt 5 and the protruding roller 12 prevents the door from turning on its hinges.

When the handle is swung outward, to un- J lock the bolt, the pressure against the door or handle will cause the bolt to encounter and be retracted by the roller against action of spring 6. During this movement the preferably beveled working end of the bolt will ride along the surface of the roller until clearing the latter. after which the door may be pushed fully open.

xIn lieu of making the abutment in the shape of a roller, a fixed beveled projection may be employed, but the roller is'considered preferable for thereasonthat it reduces friction and permits the door to be freely closed from both sides, though it can of course, only be opened from the inner side.

The peculiar construction of the bolt and its locking means has been made the subject matter of a separate patent application filed on even date herewith, the present application being intended to cover the application of said bolt and locking meansto a single leaf door.

I claim 1. A door closure comprising a door frame, a hinged door leaf. a spring bolt carried by said leaf lying, when in projected 5 for.

position, entirely back of the edge of the door leaf, and a roller rotatably mounted in V the door frame and arranged for engage-- ment With the bolt to serve as a keeper there- 2; A door closure oomprlslng a door frame, a doorleaf hinged to s'wing into'said' door frame, a lock tohold .said door leaf in closed position, said lock including a spring 10. bolticarried by-said door leaf anclpositioned qtO clear the door' fraine was the door leaf swings etoclos'ed position, and a keeper .consistifng of a rollerrotatably mounted in the 7 bolt.

'3. A door closure comprising a door 7 frame, a door leaf hinged to swing into said door frame, a"lock=to hold said door leaf in closed position, said lock including a spring bolt carried by said. door leaf and positioned to clear the door. frame as the door leaf swings -to closed position, andia'keepfer consisting of a roller rotatably mounted in the 25 frame, the doorfbeing provided with a recess adjacent the bolt vto receive k'the troller, the

parts being constructed and arranged in such mannerthat, When the door leaf is in-closed ,,posi tion, the roller contacts with said bolt and extends into-suchrecess. f r' r I WILLIAMMUMBRA R 

